The rain repellant, rain fly was developed to improve driving conditions and visibility for all weather conditions, so that you may drive in total safety. Rain fly helps the windshield wipers by providing a layer of protection against rain, sleet, mud, insects, dirt, grit, grime and grease, subtly reducing build up of dirt. Acts as a shield for rainy days and ensures clarity of vision while you're on the road. Rain fly is applicable on all exterior glass surfaces; front and rear windscreen, side windows and headlights. Avoid contact with painted surfaces, plastic and metal parts, mirrors, non-clear surfaces, surfaces treated with anti-reflective, scratch resistant or other coatings.